Add Google Maps API v3

-- Add API JSs
-- Add API calls to set markers, add routing, get directions, geo names, etc

* NOTEs:
-- The Google API key should be replaced with something else
-- Maybe leave it under review for now or remove user-visible parts before merging

* TODOs
-- Save routing to Parse DB
-- Change from/to when dragging route markers
-- Re-show routing when editing
-- Fix collapsing/expanding of the map control inside bootstrap modal